Water-heater.



S. J. HURWITZ. WATER HEATER. APPLICATION FILED MAR. 2, I916.

1 23 @fifig. Patented Jain. 30, 1917.

3 SHEETS-SHEET I.

S. J. HURWITZ Patented Jan. 30, 1917.

3 SHEETS-SHEET 2.

5.1. HURWITZ.

WATER HEATER. APPLICATION FILED MAR- 2, I916.

LZIQAGE I V Patentedian. 30,1917.

3 SHEETS-SHEET 3.

WJQTEB-HEATEE.

Specification of Letters Eatent.

Patented can. so, tea a.

Application filed March 2, 1918. Serial 150. 81,747.

To all whom it may concern:

Be it known that I, SA'MUEL J. Hun- Wrrz, a subject of the Czar ofRussia, residing at Youngstown, in the county of Mahoning and State ofOhio, have invented new and useful Improvements in Water-Heaters, ofwhich the following is a specification.

lhis invention relates to improvements in water heaters and, in thepresent instance, has particular application to a water heater of thegas burning type.

I In carrying out the present invention, it is my purpose to provide awater heater wherein the water carrying pipe and the heat ng elementwill be substantially coextensive with each other so that the watercarrying pipe will be heated, its entire length,'thereby enabling thewater to be heated in 9. mmmum time and with a comparatively smallconsumption of fuel, and furthermore, by this arrangement of watercarrying and heating pipes the water in a coil or bank of pipes may beheated instantaneously and owing to the heating means following the coilor bank for its entire height the heat will be gradually intensified asthe top of the coil or bank is approached, thereby enabling practicallyvall of the heat units to be utilizecl.

It is also my purpose to provide a water heater wherein the watercarrying pipe will be so formed in cross section as to enable the watertherein to absorb practically all of the heat units from the heatingelement below such water carrying pipe, thereby reducing waste of theheat units.

With the above and other objects in view, the invention consists in theconstruction, combination and arrangement of parts here inafter setforth in and falling within the scope of the claims.

In the accompanying drawings: Figure 1 is a view in side elevation of awater heating coil constructed in accordance with the. presentinvention, the casing being shown in section. Fig. 2 is a horizontalsectional view through the same, one convolution of the coil being shown1n top plan. Fig. 3 is a horizontal sectional view through a modifiedform of the invention showing the water carrying pipes and the heatingpipes arranged in a bank. Fig. 4 is a vertical sectional view throughthe same. Fig. 5 a transverse sectional view therethrough. Fig. 6 is across sectional view through the heating pipe. Fig. 7 is a similar viewthrough the water carrying pipe. Fig. 8 is a fragmentary top. plan newof the heating pipe. Fig. 9 is a horizontal sectional view showing thetubes as arranged in three banks. Fig.

and Particularly to the construction illus- I trated in Figs. 1 and 2, 1designates a vertically disposed coil deslgned to carry water. The lowerendof the coil 1 is equipped with a coupling 20f suitable constructionwhereby the co1l may be connected with a'water supply pipe, while theouter end of the coil is equipped with a coupling 3 of any suitableconstruction whereby the coil may be connected with an outlet pipe.

In accordance with my present invention, each convolution of the coil iselongated in cross section, as shown in Fig. 7 of the drawings, andformed in the top wall of such. convolution is a groove 4 arranged atthe center of such wall and extending around the entire convolution,while formed on the bottom of'each convolution of the coil centrallythereof and depending therefrom is a rib 5 extending around theconvolution. In the present instance, the top wall of the convolution isinclined downwardly from the groove t toward the outer end edges of theconvolution. Disposed within the groove 4. in the coil 1 and extendingthroughout the length of the coil 1 is a heating coil 6 having theconvolutions thereof disposed beneath the respective convolutions of thecoil 1.. lhis heating coil 6 is designed to carry gas or other fuel andthe convolutions thereofare provided with burner tips 7 arranged uponeach side of the ribs 5 on the convolutions of the coil 1 and the burnertips upon one side of the rib of the coil 1 diverge outwardly from thoseon the other side of the rib and formed in the coil 6 betweenthe burnertips 7 is a groove 8 extending throughout the length of the heating-coiland designed to receive the ribs 5 on the I convolutions of the coil 1so as to cooperate with the groove 4: to hold the heating coil in properposition within the water carrying coil 1. The lower end of the heatingcoil 6 is adapted to be connected to a suitable source of supply and isprovided with the usual air valve 9 and a gas controlling valve 10,While the upper end of the coil 6 terminates contiguous to the upper endof the water carrying coil.

In the use of the heater, the valve 10 is opened and the gas traversesthe coil 6 and issues from the tips 7 and is ignited. Owing to thearrangement of the tips 7 and the cross sectional formation of the coil1, the

heater. As the water carrying coil 1 is elongated in cross section itwill be noted that the water therein absorbs a relatively great quantityof heat from the flame, thereby reducing waste, while owing to thearrangement of the heating coil and the water carrying coil, the waterinthe coil 1 may be heated in a relatively short period and practicallyinstantaneously.

In Figs. 3, 4.. and 5 of the drawings, 1 have shown two vertical banksof tubes 11 and 12 arranged side by side. In the present in-' stance thetubes in the bank 12 alternate with the tubes in the bank 11. Each tubein each bank 11, 12 is of a cross sectional shape corresponding to thatof each convolution of .the coil shown in the preferred form of theinvention and seated in the grooves 4; in the upper sides of therespective tubes are heating pipes 13 extending the full length of therespective tubes and each of a cross sectional configurationcorresponding to that of the convolutions of the heating coil 6 shown'inthe preferred form of the invention. The heating pipes 13 at one end ofthe heater are tapped onto branch pipes 14 arranged adjacent to therespective banks of tubes and having the lower ends thereof connectedwith a gas supply pipe 15, while the other ends of the heating pipes 13are closed by means of caps or plugs. The tubes in the bank 11 areconnected to the respective tubes in the bank-12, at one end of theheater, by means of elbows 16, while interconnecting the tubes in thebank 11 and the tubes in the bank 12, in the reverse order, at the otherend of the heater, are elbows 17 The lower tube in one of the banks isconnected, at one end, with a supply pipe 18 and the upper tube in oneof the banks is connected, at one end, with an outlet pipe and owing tothe connections between the tubes the water will traverse the tubessuccessively, passing into and out of the tubes of the banksalternately.

It will be noted that each tube in each garages bank will be heated forits entire length owing-to the length of the pipes 13, while the heatfrom the flame issuing from each pipe will envelop the tube immediatelyabove such heating pipe and the heat from the lower pipes, ascending,will commingle with the heat from the upper heating pipes and so augmentthe action of theupper heating pipes, thereby intensifying the heat atthe upper end of the banks of tubes so as to in= ure the maximum heatingof the water in fhe tubes in the minimum time and with comparativelysmall fuel consumption.

If desired, fire bricks or other suitable heat retaining elements may beinserted in the spaces'between the tubes in the banks 11 and 12 so as toretain the heat from the heat ing-Pipes.

In the preferred form of the invention, 1 have shown the water carryingcoil and the heating coil as inclosed in a casing 19 of any suitableconstruction. I I

In the construction illustrated in Figs. 9 to 12 inclusive, 1 have shownthe tubes as arranged in three banks 20, 21 and 22 and, in the presentinstance, the tubes in the bank 20 aline horizontally with therespective tubes in the bank'22, while the tubes in the bank 21alternate with the tubes in thebanks 20 and 22. These tubes in the banks20, 21

and 22 are interconnected by means of' elbows 23 and the elbows are soarranged that the water or other fluid to be heated will traverse thetubes successively and pass from one bank to another alternately,thereby enabling the fluid in the tubes to be heated to the maximumtemperature when such fluid leaves the heater. In this construction, theheating pipes of each bank of tubes are connected with a vertical branchpipe 24 and the branch pipes 24 are connected with a common supply main25.

While I have hereinshown and described certain preferred forms of myinvention by a Way of illustration, 1 wish it to be understood that I donot limit or confine myself to the precise details of constructionherein- 1. In a water heater, a water carrying pipe elongated in crosssection .and having the upper surface formed with a longitudinallyextending groove and the lower surface formed with a longitudinallyextending rib,

and a heating pipe disposed in the groove and having the upper portionthereof formed with a longitudinal groove to receive the rib on anadjacent upper water carrying pipe.

2. in a water heater, a Water carrying pipe elongated in cross sectionand having the upper surface formed with a longitudinally extendinggroove and the lower surface formed with a longitudinally extending rib,a heating pipe disposed in the groove and having the upper portionthereof formed with a longitudinal groove to receive the rib on anadjacent upper water carrying pipe, and burner tips on said heating pipeat each side of said rib and diverging outwardly from the tips on theother side whereby the flame will be directed the next uppermost watercarrying pipe so said water carrying pipe.

against the bottom of that the heat from said flame may envelop 3. In awater heater, a water carrying pipe and a fuel carrying heating pipeparallel with said water carrying pipe and extending throughout thelength thereof, said water carrying pipe and fuel carrying pipe havingthe adjacent portions thereof formed to interfit each other.

. In testimony whereof I afi'ix my signature 1n presence of twowitnesses.

SAMUEL J. HURWITZ.

Witnesses:

JOHN J. MCCARTHY, BENNETT-S. JONES.

